The Sinularia fauna of Ambon and Seram is presented. Five new species are described and figured: S. acuta, S. corpulentissima, S. curvata, S. kotanianensis, and S. longula. In addition, specimens of S. humesi Verseveldt, 1968, and S. slieringsi Ofwegen & Vennam, 1991, are discussed. In total, the Sinularia fauna of Ambon consists of 38 species, and that of Seram of 8 species.